Valve.



PATENTED JUNE 2, 1908.

L. S. NASH.

VALVE.

APPLICATION FILED AUG 24, 1907.

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UNITED STATES PATENT OFFICE.

LAWRENCE S. NASH, OF DETROIT, MICHIGAN.

VALVE Specification of Letters Patent.

Patented June 2, 1908.

Application filed August 24, 1907. Serial No. 389,994.

To all whom it may concern:

Be it known that I, LAWRENCE S. NASH, a citizen of the United States ofAmerica, residing at Detroit, in the county of Wayne 5 and State ofMichigan, have invented certain new and useful Improvements in Valves,of which the following is a specification, reference being had thereinto the accompanying drawings.

This invention relates to a valve especially adapted for a throttle foran internal combustion motor, which acts as a screen when open toprevent back-firing from the explosion chamber of the motor through thepassage controlled by the valve, and at the same time does notmaterially impede flow of gas through the passage.

The invention consists in the matters hereinafter set forth, and moreparticularly pointed out in the appended claims.

Referring to the drawings, Figure 1 is a view in transverse section of acombined valve and screen embodying the invention, showing the valveclosing a by-pass connecting the ports of a motor, together withportions of the adjacent cylinder wall and base. Fig. 2 is a view inside elevation of the valve removed from its seat.

In the drawings, 11 are the inlet ports of a two-cycle, rear compressionmotor of conventional type, connected by the usual bypass 2, hereinshown as enlarged and provided with a transverse valve seat in which thevalve proper is rotatably secured.

The latter is a cylindrical shell 3 with an imperforate, diametricallydisposed diaphragm 4, secured as by screws 5 to the shell, extendingfrom end to end of the cylinder, and axial stems 6 thereon, adapted torotatably center the valve in the seat transverse to the by-pass, eitherof the stems affording convenient connection for any suitable operatingmeans. A series of narrow, parallel spaced slots 7 in the shell on eachside of the diaphragm 4 throughout the entire length of the shell extendfrom edge to edge of the diaphragm in planes perpendicular to the axis.

As a matter of convenience for clearing and inspecting, the valve may bemounted it controls when turned with the diaphragm squarely across theduct. When the diaphragm is obliquely disposed or in full alinement withthe passage, the slots permit direct and reasonably unimpeded flow ofthe charge therethrough, while any ignition of the charge beyond thevalve is checked by the screen and cannot fire the incoming charges. Thescreen is peculiarly effective, since excessive back pressure cannotforce the flame back through the central air spaces of the valve andthat part of the shell lying back of the seat, even if it does carry theflame into the valve interior. Again, as the valve is on contactthroughout practically its entire length with the seat, whether open orclosed, any heat in the latter is rapidly conducted to the body of thevalve which is kept cool by the free circulation of gases through it.

While herein shown and described as a throttle for a motor it may beused for any similar place where it is desirable to prevent back-firingin a current passing through it, and I do not care to limit myself toany particular use, or to any particular form or arrangement of parts.

What I claim as my invention is 1. A valve comprising a cylindricalshell having a diametrically disposed imperforate diaphragm, aperturedat intervals on each side of the diaphragm.

2. A valve comprising a cylindrical shell having a diametricallydisposed imperforate diaphragm, transversely slotted at intervals oneach side of the diaphragm.

3. A valve comprising a cylindrical shell and a diametrically disposedimperforate diaphragm secured therein extending throughout its length,said shell being provided with a plurality of transverse slots on eachside of the diaphragm, extending from edge to edge thereof.

4. A valve comprising a cylindrical shell and a diametrically disposedimperforate diaphragm secured therein extending throughout its length,said shell being provided with a plurality of narrow peripheraltransverse slots spaced at regular and frequent intervals in parallelplanes perpendicular to the axis of the valve on each side of thediaphragm, extending from edge to edge thereof.

5. A valve comprising a cylindrical shell and a diametrically disposedimperforate diaphragm secured therein extending throughout its length,said shell being provided with a plurality of narrow peripheraltransverse slots spaced at regular and frequent intervals thereof, andaxial stems on each end of the shell.

7. In an internal combustion motor, the combination with the combustionchamber, the ignition chamber and passage connecting them, of a valveconsisting of a cylindrical shell rotatably seated transversely in thepassage, having a diametrically disposed imperforate diaphragm,apertured at intervals on each side of the diaphragm.

8. In an internal combustion motor, the combination with the combustionchamber, the ignition chamber and passage connecting them, of a valveconsisting of a cylindrical shell rotatably seated transversely in thepassage, having a diametrically disposed imperforate diaphragm thereinextending from end to end thereof, said shell being provided with aplurality of peripheral slots on each side of the diaphragm, extendingfrom edge to edge thereof.

9. In a conventional two-cycle rear compression internal combustionmotor, the combination with the cylinder wall, and base wall providedwith the usual piston controlled inlet ports and by-pass connecting theports, of a valve consisting of a cylindrical shell rotatably seatedtransversely in the by-pass having a diametrically disposed imperforatediaphragm of sufficient extent to close the by-pass when turnedtransversely thereto, said shell being provided each side of thediaphragm extending from edge to edge thereof.

10. In a conventional two-cycle rear compression internal combustionmotor, the combination with the cylinder wall and base wall providedwith the usual piston-controlled inlet ports, of a removably securedexterior casing, bridging the ports and forming with the walls aby-pass, and a hollow cylindrical valve journaled in the casingtransversely to the by-pass having a diametrically disposed imperforatediaphragm secured therein of suflicient extent to close the by-pass whenturned transversely thereto, said shell being provided with a series ofnarrow peripheral slots on each side of the diaphragm extending fromedge to edge thereof.

11. In a conventional two-cycle rear compression internal confoustionmotor, the combination with the cylinder wall and base wall providedwith the usual piston-controlled inlet ports, of a removably secureddiaphragm journaled in the casing.

In testimony whereof I afiix my signature 1n presence of two wltnesses.

LAWVRENCE S. NASH. Witnesses A. M. Donn, O. ,R. STIoKNEY.

with a series .of narrow peripheral slots on.

exterior casing bridging the ports and formthereof, and axial stems oneach end of the

